Arturia Prophet V - Additional Synthesis Modules

ARTURIA – PROPHET V - MANUAL
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6.2 Other modules
6.2.1 The keyboard
If we stop here, the sound that you will obtain will be uniform, without life and without an
end!! The oscillator delivers a sound signal (the audio output of a waveform) of a fixed pitch in
a continuous manner. In the diagram above, the only way to stop this quickly unpleasant sound
is to lower the filter cut-off frequency so that it becomes more and more damp until it finally
disappears; or simpler yet, lower the volume of the amplifier!
 To start and stop the sound, and this at the tone that we require, we use a keyboard that
is connected both to the VCA through a gate and to the frequency of the oscillators. This
will «play» the sound as soon as a key is pressed, and mute it when released. Of course,
this connection is made through MIDI (it replaces the «gate» type of connections on analog
synthesizers, which trigger the note when a key is pressed and stop it when released).
 Secondly, for the notes to tune correctly to the notes of the keyboard, you must apply a
keyboard following modulation (replacing the 1volt/octave control present on most
analogic synthesizers).
If you do not use a MIDI keyboard, you can also play on the virtual keyboard of the Prophet V, but your sequencer will
not record those actions, it is for auditioning presets and programming only.
6.2.2 The envelope generator
The envelope generator, connected to the amplifier, is used to «sculpt» the volume of the sound
when we press a key on the keyboard and ends after the note is released.
The most common modules developed use 4 settings that we can vary:
• The Attack is the sound that the sound will take to reach its maximum volume once
we have pressed a key on the keyboard.
• The Decay (fall) is the time that the sound will take to diminish after the attack
portion is complete.
• The Sustain (hold) is the maximum volume level that the sound will reach after the
decay is complete.
• The Release is the time that the sound will take to diminish once the key has been
released.